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無損檢測之Ｘ射線檢測實時成像技術(shù)分辨率
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實時成像推動介入放射學(xué)的發(fā)展
21ic訊 當(dāng)患者在躺手術(shù)臺上，介入放射學(xué)醫(yī)師會引導(dǎo)導(dǎo)管運動，通過一系列錯綜復(fù)雜的動脈血管。當(dāng)醫(yī)師引導(dǎo)導(dǎo)管通過動脈網(wǎng)到達冠狀動脈和所關(guān)注的區(qū)域時，醫(yī)師可從顯示器上得到實時反饋，從而小心地移動導(dǎo)管進行介入治療
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核輻射劑量場分布進行實時成像測量的新方法—陣列式吸收發(fā)光CT法
本文利用閃爍體的吸收發(fā)光特點，并結(jié)合計算機斷層掃描技術(shù)，提出了對核輻射劑量場分布進行實時成像測量的新方法——陣列式吸收發(fā)光CT法，研制出閃爍光纖陣列構(gòu)成的核探測器及其伺服控系統(tǒng).采用高靈敏度的電
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核輻射劑量場分布進行實時成像測量的新方法—陣列式吸收發(fā)光CT法
本文利用閃爍體的吸收發(fā)光特點，并結(jié)合計算機斷層掃描技術(shù)，提出了對核輻射劑量場分布進行實時成像測量的新方法——陣列式吸收發(fā)光CT法，研制出閃爍光纖陣列構(gòu)成的核探測器及其伺服控系統(tǒng).采用高靈敏度的電
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基于CMOS探測器的射線檢測設(shè)計應(yīng)用
概述：以CMOS探測器為記錄介質(zhì)的數(shù)字化射線檢測技術(shù)，檢測精度高、溫度適應(yīng)性好、結(jié)構(gòu)適應(yīng)性強。CMOS射線掃描探測器探測單元排成線陣列，需要在檢測時進行相對掃描運動，逐線采集并拼成完整的透照投影圖像。介紹了檢測工裝設(shè)計，完成了探測器的固定、位置調(diào)節(jié)及實現(xiàn)與檢測工件的相對運動。介紹了檢測應(yīng)用中的探測器配置與校準(zhǔn)、透照方式選取、運動速度控制、檢測參數(shù)優(yōu)化、缺陷定量分析和圖像存檔管理等。應(yīng)用結(jié)果表明，經(jīng)過工藝優(yōu)化，CMOS探測器能夠?qū)崿F(xiàn)大多數(shù)產(chǎn)品零部件的射線檢測。最后分析了應(yīng)用中存在的問題及后續(xù)研究方向。 Application of Direct Radiography Using CMOS X-ray Linear Array Detector SUN Chao-Ming, LI Qiang, WANG Zeng-Yong, LI Jian-Wen (Institute of Machinery Manufacturing Technology, CAEP, Mian yang 621900, China) Abstract: The digital radiography（DR） using complementary metal oxide silicon(CMOS) X-ray linear array detector as record media had advantages of higher spatial resolution, better temperature adaptability and flexible structure adaptability. During radiographic testing, relative movement of the detector and the work piece was necessary to collect each line of the scanned image, as the detecting units were lined in a row. So the testing equipments were designed to mount the detector, adjust the relative position and move the work piece according to its structure. The testing procedure comprising configuration and calibration of the detector, selection of the applicable scan mode, control of the scan speed, optimizing of the testing parameters, segmentation and quantification of defects and archiving and retrieval of the digital images were described. After optimizing the testing process, it showed that CMOS detector had capability to achieve better images and it could be used in radiographic testing widely. The benefit of using DR and some problems to be solved were talked in the end. Keywords: Digital radiography; CMOS X-ray linear array detector; Process optimization
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基于CMOS探測器的射線檢測設(shè)計應(yīng)用
基于CMOS探測器的射線檢測設(shè)計應(yīng)用
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核輻射劑量場實時成像測量系統(tǒng)的研究
本文利用閃爍體的吸收發(fā)光特點，并結(jié)合計算機斷層掃描技術(shù)，提出了對核輻射劑量場分布進行實時成像測量的新方法——陣列式吸收發(fā)光CT法，研制出閃爍光纖陣列構(gòu)成的核探測器及其伺服控系統(tǒng).采用高靈敏度的電
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核輻射劑量場實時成像測量系統(tǒng)的研究
本文利用閃爍體的吸收發(fā)光特點，并結(jié)合計算機斷層掃描技術(shù)，提出了對核輻射劑量場分布進行實時成像測量的新方法——陣列式吸收發(fā)光CT法，研制出閃爍光纖陣列構(gòu)成的核探測器及其伺服控系統(tǒng).采用高靈敏度的電
